Is this right for her to spy on me?

So I am pretty sure that my mom is tracking my phone (reading messages, seeing who calls, etc.) I am sure she tracks my younger siblings phones too. I just feel like I don’t have any privacy. I am 22 and I just feel like there is no need to spy on me. I’ve been a pretty good kid. I never partied or anything. I don’t mind telling my mom where I am going. I have a feeling that she is tracking my phone because there is stuff that she has brought up that only my boyfriend would know or one of my friends would know. She just always says “I have my ways” or “a mother always knows” when I ask how she knows. I really want to talk to her about it, but I don’t know if my siblings will like that. I just want her to be honest about how she knows stuff.